Nisha N et al., J <strong>Vaccines</strong> Vaccin <strong>2013</strong>, 4:5http://dx.doi.org/10.4172/2157-7560.S1.0173 rd International Conference on<strong>Vaccines</strong> & VaccinationJuly 29-31, <strong>2013</strong> Embassy Suites Las Vegas, NV, USATetravalent protein vaccine against Staphylococcus aureusNisha N and Raja BiswasAmrita Centre for Nanosciences and Molecular Medicine, IndiaStaphylococcus aureus causes wide range of diseases from minor infections to life-threatening sepsis, endocarditis, andpneumonia. Several antigens have been identified so far as vaccine that, either alone or in combination have the ability toreduce S. aureus (including multi drug resistant strains) colonization in animal models but with little success. Here we exploredthe possibility of designing a vaccine based on non-covalently surface associated proteins (NCSPs) of S. aureus. The knownNCSPs proteins [GM, Aaa, LytM, IsaB, SEM, SsA, Amidase( AM), LytR, LytN ,and SAV-1056] were cloned and expressed in E.coli as N-terminal histidine tagged protein and purified using Ni-NTA chromatography. The antigenicity of these proteins wastested against sera from S. aureus infected mice using ELISA and immunogenicity tested using mice splenocyte proliferationassay. All the NCSPs were antigenic and immunogenic; however the degree differed among NCSPs. The shortlisted proteins, withhigh homology score across different S. aureus strains, were used for vaccination study in BALB/c mice. The selected proteinswere found to trigger Th1 response in splenocyte proliferation assay. Upon vaccination with a cocktail of NSCPs in BALB/cmice, we observed that all the vaccinated mice survived till the 9th day, and 6 survived till day 14 (75% survival). Only 1 out of 8non-vaccinated mice survived after lethal challenge with S. aureus. There was 6-7 fold reduction in the bacterial load in internalorgans of vaccinated mice. The sera of the vaccinated mice were capable of inducing opsonophagocytosis of S. aureus by humanpolymorphonuclear leukocytes.BiographyNisha N is currently undergoing her Ph.D. program in the fi eld of Infectious diseases at Amrita Center for Nanosciences and Molecular medicine,AIMS, Kochi. She has been awarded with Senior Research Fellowship by Indian Council of Medical Research, India. She has two second authorpublications to her credit and her main work yet to be published.nishaaa.n@gmail.comJ <strong>Vaccines</strong> Vaccin <strong>2013</strong>ISSN: 2157-7560, JVV an open access journal<strong>Vaccines</strong>-<strong>2013</strong>July 29-31, <strong>2013</strong>Volume 4 Issue 5Page 104
Yurong Tan et al., J <strong>Vaccines</strong> Vaccin <strong>2013</strong>, 4:5http://dx.doi.org/10.4172/2157-7560.S1.0173 rd International Conference on<strong>Vaccines</strong> & VaccinationJuly 29-31, <strong>2013</strong> Embassy Suites Las Vegas, NV, USAAn inactivated Pseudomonas aeruginosa vaccine restores imbalanced airway immunityYurong Tan, LiLi wang, Dan Peng, Huihui Yang and Xiaoqun QinCentral South University, ChinaObjectives: Previously, we observed that an inactivated Pseudomonas aeruginosa vaccine (PPA) which was obtained bytransfection with the adhesion portion of type 1 fimbria of avian pathogenic E. coli inhibited airway allergic inflammationby bronchial administration in an OVA-induced airway hyperresponsiveness animal model. To investigate the underlyingmechanism involved, we studied the effects of PPA on epithelial functions in present studies by OVA stress or RSV infection.Methods: Flow cytometry was used to observe the effects of PPA on cell proliferation of BECs and BECs-drived subsets’differentiation of CD4+T cells. Real-time PCR was used to test the expressions of toll like receptor 4 and 5, two recognizedasthmatic therapeutic targets IL-17A/Th2 signal molecules Act1 and NF-kB negative regulator A20 in BECs.Results: PPA can promote cell proliferation and toll like receptor-4 and 5 expressions of normal, OVA-stressed and RSV-infectedBECs. PPA inhibited Th2 and Th17 differentiation and stimulated Th1 differentiation induced by OVA or RSV. PPA significantlydecreased Act1 expression induced by OVA and increased Act1 expression in BECs inhibited by RSV infection. PPA significantlyincreased A20 expression in BECs inhibited by OVA or RSV.Conclusions: Our data suggest that the therapeutic mechanism of PPA is partly to promote bronchial proliferation and shiftbronchial immunity from a Th2 and Th17 to a Th1 bias.Keywords: Pseudomonas aeruginosa, toll like receptors, RSV, CD4+T cells.hope7@126.comJ <strong>Vaccines</strong> Vaccin <strong>2013</strong>ISSN: 2157-7560, JVV an open access journal<strong>Vaccines</strong>-<strong>2013</strong>July 29-31, <strong>2013</strong>Volume 4 Issue 5Page 105
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